Update moby/buildkit to latest version

[mrbusche]

Describe the bug

moby/buildkit:v0.11.0 contains 2 CVEs that are not present in moby/buildkit:v0.11.4. I built my own image using v0.11.4, but when trying to run with that image I ran into an error of failed to start buildkitd: setup cgroups: fork/exec /usr/bin/setup-cgroups: no such file or directory

Reproduction steps

1. Build an oci-build-task image using moby/buildkit:v0.11.4
2. Attempt to use that image to build your docker image
3. Receive error of failed to start buildkitd: setup cgroups: fork/exec /usr/bin/setup-cgroups: no such file or directory

Expected behavior

The oci-build-task image runs without any CVEs present

Additional context

The Security policy did not have any options, individual email addresses are not public and GitHub Security Advisory is not enabled on the repository. Docker images are pushed to docker hub with appropriate tags https://hub.docker.com/r/mrbusche/oci-build-task